Warp-let-off control.



J. P. COSTELLO. WARP LET-OFF GONTROL. APPLICATION FILED FEB. 23. 19H.

. Patented Aug. 13, 1918.

3 SHEETSSHEET l.

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J. P. COSTELLO; WARP LET-OFF CONTROL.

APPLICATION FILED rmzs. 1911. Patented Aug. 13 1918' 3 SHEETSSHEET 2-#vvavrae BY f a ATTORNEY 1n: noun: rrrnvs ca. main-1.1mm. wAsmncmn. o. c

J. P. COS'IELLO. WARP LEI-OFF CONTROL- APPLICATION FILED FEB. 23. 1912.

Patented Aug. 13, 1918.

3 SHEETS-SHEET 3.

lNVE/VTOR 0W f I s z: ATTORNEY UNITED STATES PATENT onnron.

JOSEPH IE. COSTELLO, OF'PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALFTO GEORGE J. COSTELLO, 0E EHILADELEHIA, PENNSYLVANIA.

WARP-LET-OFF CONTROL.

Specification of Iletter's Patent. I

' Patented Aug. 13, 1918.

Application filed February 23, 1917. Serial No. 150,368. I

To all whom it may concern:

Be it known that I, JOSEPH P. Cos'rnLLo, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia, State ofPennsylvania, have invented a new and useful TNarp-Let-Oif Control, ofwhich the following is a specification.

My invention relates to improvements in backing warp let-off control forlooms. The object is to provide an automatic control for let-offmechanism which shall be simple, positive and uniform in its operation,thereby assuring an even delivery of the warp and preventing the markingof the goods caused by uneven tension of the backing warp threads.

My improvement comprises a compound lever, the longest element of whichbeing vertically arranged. By compounding the lever, unevenness oftension due to momentum, is prevented and floor space is economized. Mymechanism is especially applicable to plush weaving.

Referring to the drawings, which illustrate merely by way of example,suitable means for effecting my invention Figure 1 is an elevation takenfrom the left hand side of the machine as shown in Fig. 2.

Fig. 2 is a'rear elevation of same.

Fig. 3 is a side elevation of a modification.

Fig. 4 is a detail in plan, on an enlarged scale, the horizontal sectionbeing on the line 4-4 of Fig. 1.

Fig. 5 is a detail in elevation of the pawl and ratchet mechanism, alsoon an enlarged scale.

Similar numerals refer to similar parts throughout the several views.

Referring especially to Fig. 1, the stationary frame-work of the loom isindicated by the numeral 7 The warp beam 8 for the top and bottombacking warps is supported on the shaft 9 journaled in the bracket 10which is connected with the-stationary frame 7.;All of the backing warpspass from the beam 8 around roller 11 and then the vibrating roller 12,the bottom warps then passing around roller 13 and roller 14, while thetop warps pass around roller 15. Mounted'on suitable shaft 26, havingthe same axis as roller 11, are thepair of levers 16, extending upwardlyin substantially vertical 'directiornand connected at their upper ends,by the pivots 17, with the links '18 which in turn connect at theirother ends, by p1vot 19, w th the upper ends of. the ver-. ticallyextending arms 20 which are rigid with the horizontally extendingarms'21.

These arms 20 and 21 form bellcrank levers pivotally mounted at 22 andhave secured at their free ends 23, the rods 24 provided with theweights 25. Thus it will be seen that the gravity actuation due toweights 25, acting through the bell leversand links, tends to move thelevers 16 in the clockwise direction. Securedto one of levers 16 is thedownwardly extending lever 27 which is provided at its lower end withthe horizontal extension 28 for thepurpose hereinafter tobe described.The roller 12 is mounted on the shaft 29 journaled in the U- shapedhousings 30 carried onthe levers 16.

Mounted in suitable bearings 31 and 32, secured to the stationaryframe-work, is the vertical shaft 33 which is provided with the worm 44cooperating with the worm gear 35 keyed onshaft 9 of the warp beam 8.--On this same shaft 33 is keyed the ratchet 34, and loosely mounted onthe shaft 33 is the lever 35 carrying the pawls36 and 37. At the outerend of this lever '35 is provided a stud 38. This stud. 38 engages in aslot 39 of the rod 40 whiohis in operative relationship with the swordarm not shown, and is caused to reciprocate ina desired relationshipwith the operation of the loom. On the stud 38 is also mounted the pawl37, while pawl 36 is mounted upon an extension 41 of the lever- 35.These pawls are adapted to alternate in their engagement with a ratchettooth of the ratchet 34, which arrangement makes it possible to reducethe number of teeth'in said ratchet 34. A spring, 42 is con:

nected between the lever- 35 and. a stationary 95 abutment, and a thumbnut 43 is provided for adjusting the tension of this spring. The stud 38projects downwardly from lever 35 and forms a pivotal support for pawl37 Stud 38 also projects through the slot 39 of 100 lever 40 anddownwardly below said. lever into alinement with the end or nose 28 oflever 27. I

The operation is as follows As the rod 40 vibrates, with each ment totheleft it will pull the lever 35 in the. counter-clockwise direction andcause corresponding movement of the ratchet 34. Upon the return movementof the rod'r40lthe lever 35 will normally be moved by the 110 move'spring i2 back to the initial position with one pawl in engagement witha ratchet tooth. As the ratchet 341 is rotatedstep by step by thereciprocating movement of rod a0 as described, the shaft 83 to whichthe. ratchet is keyed, and the worm 1 1 also keyed to said shaft 83, arecaused to rotate correspondingly, whereby the worm gear'or pinion whichis meshed with the worm ii and keyed on shaft 9, or otherwise rigidlyconnected with the beam 8, causes a corresponding step by step rotationof the warp beam.

This actuating device is so arranged that if the beam were given a stepby step rotative movement with each reciprocative nrove ment of thelever 10 the same would deliver more warp than the taking up rollerrequires. This permits of the. following mechanism for limiting thedelivery or let-off of the warp to the exact requirements of the loom:

As has been stated, the warp first passes around the roller 11 and thenaround the vibrator roller 12. lVhen more warp is let off from the beamthan is required, the roller 12, mounted on levers 16, which are underthe tension of the weigl'its 25, is immediately pulled forward ordownward to take up what would otherwise be a slack in the warp, andthus maintains the tension or said warp constant. This movement howeverpermits the corresponding movement of levers 16 and of lever arm 27, andconsequently the forward movement of the nose or projection 28, so thatsaid nose will engage with stud 38 on lever 35 to prevent said leverfrom returning to initial position, in response to the spring 42, uponthe movement to the right of lever 40; thus lever 40 will reciprocateidly, without effecting the pawl and ratchet, until the excess of warpdelivered from beam 8 has been used and the vibrator roller 12 is pulledback to original position, whereupon the actuation of the beam asdescribed, will be' continued or repeated. In this waythe beam isactuated to let ofi" the warp in accordance with the exact requirementsof the loom, and entirely automatically, without adjustment from thebeginning and until the total content of the beam has been delivered.

By compounding the. levers controlled by weights 25 as described,several advantages are secured over the simple lever, for example, byincreasing the number of bearing points and the direction of movementsof the parts, the sudden jars and unduestresses, due to momentum, areovercome, and a more even and constant tension of the warp ismaintained. The desired leverage is secured readily without anyundesirable extensions over the fioor and thus floor space is economizedand less weight or counterbalance is required.

In Fig. 3, I show my invention as applied to a loom for weaving figuredplush, where the tight backing warp beam is controlled by my automaticmechanism. The arrangement difi' crs somewhat, but the principle ofoperation is substantially the same.

Referring to this structure illustrated in Fig. 3, levers 16 arepivotally mounted at -15 and are provided with extensions 46, carryingthe U-shaped housings 47 forthe shaft or journals -18 of roller 4:9. Thelower ends of levers 16 are connected by the links 50 with bell crank 51supported on the'journals or rods The outer ends of the horizontalextensions of levers 51 are connected to the rods 24; carrying theweights 25.

Rigid with the levers 1G is the upwardly extending arm connected withthe rod Said connection is made adjustable by the nuts on a threadedportion of said rod 54. Rod 5 1 is connected to one arm of thebell-crank 56, the other arm 5 of which is adapted to engage anddisengage the pawl arm 35 to prevent its responding to the actuation ofspring 42, in the manner described, with respect to the end 28 of lever27 as shown in Figs. 1 to 6 inclusive.

In the structure shown on Fig. 3 the warp threads pass from the beam 8around roller 58, having the same axis 45, as that of levers l6, thencearound vibrator roller 19, carried on the ends of extensions 46 oflevers 1G, and thence around rollers 60 and 61, so that the vibratorroller 49 being under the tension of the weights 25, will respond to thevariations of let-off of beam 8 and will maintain an even tension ofsaid warp and will con trol automatically in the manner described, thepawl and ratchet actuation of beam 8.

By the arrangement above described, it is possible to place the beamsabove the machine as shown in Fig. 3, and thus escape the creel.

What I claim is r 1. In combination with pawl and ratchet let-01factuation for warp beams, an auto- 'matic control comprising a pair ofcompound lever elements, the first element pivotally connected at oneend to the loom frame and having an extension beyond said connection forcontrolling the pawl and ratchet actuation and provided with ournalbearings near said pivot connection, a vibrating roller mounted in saidbearings, a second lever element of bell crank formation linked as toone extension to the free end of the first element and a weightconnected with the other extension, the axis of the vibrating rollerpositioned between vertical lines passing through the axis of the firstlever element and the point of weight connection.

2. In combination with pawl and ratchet let-off actuation for warpbeams, an automatic control comprising a pair of compound leverelements, the first element pivotally connected at one end to the loomframe and provided with journal bearings near said pivot connection, avibrating roller mounted in said bearings, a second lever element ofbell-crank formation linked as to one extension to the free end of thefirst element and a weight connected with the other extension, the axisof the vibrating roller positioned between vertical lines passingthrough the axis of the first lever element and the point of weightconnection and an extension beyond the pivot support of the first leverelement operating to render the pawl and ratchet ineitective.

3. In combination with pawl and ratchet let-ofi actuation for warpbeams, an automatic control, comprising a pair of compound leverelements having the longest ele-- mentvertically extending and pivotednear one end directly to the loom frame and provided with journalbearings near said pivot connection, a vibrating roller supported insaid bearings, a bell lever element having a.

horizontal extension provided with a weight, a link connecting the twolever elements,and an extension beyond the pivot support of the firstelement operating to render the pawl and ratchet ineffective.

4. In combination with let-otl' mechanism for looms, comprising a pawland ratchet, an automatic control therefor comprising on each side ofthe loom frame, a pair of levers pivotally mounted, each lever having asubstantially vertical portion, means connecting the free ends of saidvertical portion, one lever also having a substantially hori zontalportion, and a weight connected near the free end thereof, the otherlever provided with a journal bearing near its axis of movement, atension roller supported in said journal bearing, and a projectionextending. beyond said axis of movement, adapted when the tension rollermoves to take up excess of warp delivered from the beam to prevent theactuation of the ratchet.

In combination with pawl and ratchet let-off actuation for warp beams,an automatic control comprising compound lever elements in duplicate asfollows, a bellroller being on opposite sides of a vertical line passingthrough the axis of the vertically extending lever.

6. In combination with pawl and ratchet actuating means for warp beams,an automatic control comprising a vibrating roller, two pairs of leverspivotally mounted on the loom frame, connecting links pivotally securedto the free ends of each pair of levers, one pair of said leversprovided with journal bearings near their pivot support, the vibratingroller journaled in said bearings, the other pair of said leversprovided with weights, and a projection connected with the firstmentioned pair of levers for preventing the pawl and ratchet actuationwhen the vibrating roller moves to take up slack in the warp.

7. In combination with a pawl and ratchet actuation for warp beams, acontrol therefor comprising a pair of vertically extending parallellevers pivotally mounted directly on the loom frame and provided withjournal bearings for a vibrating roller, said bearings located close tothe axisot' said levers, a pair of hell levers having vertical andhorizontal extensions, links connecting said vertical extensions withthe free ends of the first mentioned levers, weights connected near theouter ends of said horizontal extensions, an extension beyond the pivotsupport of the first mentioned lever operatin g to render the pawl andratchet actuation inoperative.

JOSEPH P. COSTELLO.

Copies of this patent may be obtained-for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

